Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd50e9ed2caeb9c…

MALICIOUS

PDF

40.0 KB Created: 2020-11-03 21:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d8cc4223cba2c14845f5b05f9848d83d SHA-1: 163e18386565908cd91836851441a683446a55ed SHA-256: 2dd50e9ed2caeb9cdfdd74cf001f06394cd00fe3aa232f071982b04c9c9949cc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?keyword=hunter+cuny+spring+2020+calendar In PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/7901005.pdfIn PDF document text
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/wigudir.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/bamuluniga.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/somomikew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/susopuzupure/xotapogojovabobuwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98a2133-763b-4bfc-a3d7-856d895cbf8c/mukejazabinevebane.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/metovexejekeke.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/psc_bulletin_2019_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94cf88b-d1b4-497b-9402-b93441ca26bc/eero_router_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/batch_watermark_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/manual_for_ge_profile_arctica_refrigerator.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBE 5348 bytes
SHA-256: 8ea49acd0b4a7907654f3f4c4874d94af11115a0d0628dacea74569246c60f78
font_01_sfnt_off00005ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 11072 bytes
SHA-256: cf488a922955a43fd9b754389ef528f79357ff39ba3795307385346c13eaf2e5
font_02_sfnt_off000085ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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